Table 1. Frequency of the number of canal orifices seen in mandibular first and second molars.

Number of canal orifices	1	2	3	4	5	6	df	Chi square value	p value
Mandibular first molars (n = 1,067)
Frequency	–	–	616	334	94	23	4	808.82	0.01*
Percentage	–	–	57.8	31.3	8.8	2.1
Mandibular second molars (n = 1,067)
Frequency	69	399	425	164	–	–	4	338.29	0.01*
Percentage	6.4	37.4	39.8	16.4	–	–

Notes:

Test applied: Chi-square test.

^*p ≤ 0.05 statistically significant.